Split Pane Remote Domains

[DavidRR-F]

Problem: Default wezterm split pane actions do not support splitting panes with remote domains

Feature: Configure split pane keybinds with remote domain switching either with MuxDomain attach (if possible) or find domain infomation and run native command in SpawnCommand (i.e. ssh username>@<hostname etc,,,)

Maybe something like this could work:

if is_remote_domain(domain) 
    window:perform_action(
        act.SplitHorizontal { domain = 'CurrentPaneDomain' },
        pane
    )
    domain:attach()
end

[MLFlexer]

So I have done some research and found a possible method of "faking" ssh domain splits via exec_domains.

It should be possible parse the config ssh domains to either have one exec_domain for each ssh config, or have the cmd args to a single exec_domain contain the nessisary ssh command. I think the latter is the cleanest solution

config.exec_domains = {
    wezterm.exec_domain("exec", function(cmd)
        cmd.args = { "ssh", "mlflexer@192.168.0.42" }
        return cmd
    end),
}

config.keys = {
    {
        key = "-",
        mods = "CTRL",
        action = wezterm.action_callback(function(window, pane)
            pane:split({ domain = { DomainName = "exec" } })
        end),
    },
}

[DavidRR-F]

Oh Interesting. So these exec_domains get handled differently than remote domains do. The remote domains (ssh, tls, and unix) essentially use wezterm connect which uses the selected protocol to connect to a remote wezterm instance running on the server which allows for multiplexing in the same window without making a new connection. So technically you could just expand on the ssh doc like this:

local wezterm = require 'wezterm'

local ssh_domains = {}
local exec_domains = {}

for host, config in pairs(wezterm.enumerate_ssh_hosts()) do
  table.insert(ssh_domains, {
    name = host,
    remote_address = host,
    --assume_shell = 'Posix',
  })
  table.insert(exec_domains, 
    wezterm.exec_domain(
        "exec: " .. host,
        function(cmd)
            cmd.args = { "ssh", config.user .. "@" .. config.hostname }
            return cmd
        end
    )
  )
end

return {
  ssh_domains = ssh_domains,
  exec_domains = exec_domains,
}

This would add the exec_domains to your list of domains that are usable in the split commands and you would have both the ssh_domain and exec_domain for spawning in the new tab or exclude ssh_domain if you have no need to multiplexing on a remote server.

Or I could add a piece to the apply_config that would add the exec_domain for each ssh_domain defined in the user config, but this would remove the ability to exclude the ssh_domains (which require a remote wezterm instance)

What are your thoughts?

[DavidRR-F]

I figured it out. I have added configuration options to automate the configuration of ssh and exec domains this should will allow splitting panes into an ssh session

{
  keys = ...,
  icons = ...,
  auto = {
    ssh_ignore = false,
    exec_ignore = {
      ssh = false,
      docker = true,
      kubernetes = true
    },
  }
}